<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>计算属性</title>
</head>
<body>
<div id="example">
  c = {{ example }}
</div>
<script src="//cdn.bootcss.com/vue/2.2.1/vue.js"></script>
<script>
  var vm = new Vue({
    el: '#example',
    data: {
      a: 1,
      b: 2
    },
    computed: {
      example: {
        cache: false,
        get: function () {
          return Date.now();
        }
      }
    }
  });
</script>
</body>
</html>
